Air-lift pump



July 22, 1930. \H. B. HALVRSEN r AIR LIFT Pun? Filed spt. 28, 1925 O O O O O ab w.

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`Patented July 22, 1930 A U1\1rri=:.o STATES PATE-Nr OFFICE HALBERT B. HALvoRsEN, or MICHIGAN CITY, INDIANA, ASSIGNOR TosULLrvAN MA- OHINERY COMPANY, A CORPORATION or MASSACHUSETTS AIR-LIFT V:PUMP

" Application lled September 28, 1926. Seria1No.'138,297. i

vMy invention ,relates to air lift pumps, and more particularly to foot pieces for such pumps.

One object of the invention isY to provide an improved foot pieceone which shall offer anunobstructed passage to the material to be handled, which shall be comparatively small in proportionto its pumping capacity, which shallbe inexpensive and capable of construci -tion of any material of acid-resisting character, and which readily adapts itself to backblowing andcleaning. Other obj ects and advantagesiof the invention will subsequently appear. i

Inlthe accompanying drawings, inwhich for purposes of illustration I have shown two forms which the invention may `assume in practice, s j

Fig.` 1 is a central vertical section through iQ one form offmy improved foot piece.

Fig; 2 is a plan view taken on thesection line 2-'-2 ofFig. 1. 7 Fig.3 is a'vertical'se'ction on the line 3-3 ofFig.2. i i.

Fig. 4 isa central vertical section through another form of my invention. Fig. V5 is a vertical section on the line 5-'- of]5`ig.6,andA .Y j i Y Fig; 6i's a `plan view taken on the section line 6--6 of Figfil. y f

`Referring tothe drawings and first to the illustrative form of the invention disclosed in Figs. 1 to 3, the ootpiece isindicated- Generally at 1. The foot piece 1 maybe `formed of any suit-ablev material, and being `well adapted for handling `acids may well be formed ot any acid resisting material. It is, in the embodiment in questionyformed of two parts: a casing 2 and anaerating section 3. The casing 2 provides -a chamber 4 having spaced upwardly extending'por'tion s 5 and 6, separatedby a wall 7 and opening into eachother at 8 at the bottom of the casing. The bottom of the. casing is curvedl at 9 `to promotegsmoothnes's ofV 'flow and the, top "of the'casing has an integral cover 10 Vhavingan opening 11`for the connectionv of the liquid supply line 12 and an opening 13 for `the insertion and mounting of the'aeratingsection 3. The chamber portion 6 is substantially larger incross sectionthan the portion 5 and Vhas a laterally projecting pocket 14 forvV the aerating Huid-connection. The outside wall of the pocket is so formed that its eXtreme distance from `the central vertical line ofthe foot piece is equal to orless than the distance from said line to the furthest other points in the casing 2. `The aerating section 3 comprises a downwardly projecting portion 15 Haring f at its lowerend, a flange 16 seatingon the f `cover 10, throughthe opening 13 which the yportion 15 extends downwardly,and an upwardly extending section 18 to which the riser or discharge pipe 19 connects; L

The portion 15V has a number of orifices-20 -for admitting airor other gaseous `pumping iiuid, and curves laterally at its lower endftowardsthe chamber 5, terminating just short of the opening 8 so that an annular'opening 21 is provided through which sediment may pass into .the bottom ofthe casing.V An air or other gaseous fluid pressure line V22 connects `with the pocket ltand so with the space in chambert surrounding the portion 15 of sec-,

tion 3. A clean outplug 23 is removably n -se'cured inthe bottomofthe casing'2.' The internal diameter of `the section 3 is substantiallythe same as the internal `diameter 'of the discharge line 19 so that utmost smoothness of flowis obtained. The axes of the connections -12,1`9. and 22 aresubstantially atthe edgesofa right triangular prism and the parts are soproportioned that when disposed in a casing, one of a minimum size maybe y used. i

`The mode Ofoperationo the structure de scribe'd willbe obvious. The foot piece 1 .will be disposed in a `pitat a suitable depth below the source of liquidto provide an adequate headl and connected by the line 12 with such source, while the line 19`leads to thevdesired point of discharge. vThe gaseous pumping fluid will be admitted through the pipe 22 and from chamber 6` will passthrough the orifices` into the section 3 and aerate the column andv so eifect pumping. The chamibervG cannot become clogged `due vto the pres"- encev ofthe annular 'opening 21 and this also useful during .backblowing u The removal ofplug 23 allows removal of sediment.

a non-obstructed passage to the material'to be handled, which is very compact and inexpensive, which 4readily adapts "itself to ibaclrblowing. andcleaning and which due toits simplicity lendsitselfto manufacture of any suitable"acid-resistant material. i

vVVhileI have in this application specilically described two forms and a modification thereof which my invention assume in practice, it will be understood. that these forms ofthe same are shown for purposes of 5 Aillustration and that the invention may be modified andV kembodied in various other forms without departing from its spirit or the-scope of the'appended claims.

What I claim as new and desireN to secure by-Letters-Patent is: v f

' l. v'Ina foot piece or pump, a casing member providing substantially parallel upwardly extending chambers connected at their lower ends,A one of said chambers having va connection at itsupper Vend for a yliquid supply line, a perforatedtubular element suplported upon the top 'of said casing'member and extending downwardly'into said other chamber, an`air connection to'said last chamber, and a dischargev connection communicating with said perforated tubular element', the liquidaera'tedwithin said tubular member passing therefroml byway of said discharge connection. .f `1

v2. Inafoot piece or pump, a casing member providing substantially parallelupwardly extending chambers connected: at their 'lower -endsyone of said ychambers having a connection at its upper end for a liquid supply line, a perforated tubular element eX- tending downwardly 'into saidy other `Ychamber, and intozadjacency tothe point ofjunction/,between said-chambers whereby' an annularopening'is provided, anair connection to said last chamber,.and ay discharge connection 'communicating with "said,` .perfor-ated rtubularv element, .the liquid f'aerated within said tubular member: passing? therefrom* by way-` of said fdischargez connection. ff Sfinx-a, foot pieceorfpump, afcasing member `I=providingif` substantially parallel f upwardly extending-chambers `zconnected at their'lower ends, Ione e ofV saidchambers havlng ya:connection at fits upper 'end'for -a'liquid f supply-:fline,` aeperforated ',-tubular element supported upon the top of said casing member and extending downwardly into said other chamber, an air1 connection to said last chamber opening laterally thereinto, and a discharge connection communicating with said perforated tubular element, the liquid aerated within said tubular member passing therefrom by Way of said discharge connection.

4;. In a foot piece or pump, a casing member providing substantially parallel upwardly extending chambers conected at their lower ends, one of said chambers having a connection at its upper end for a liquid supply line, a perforated tubular element extending downwardly into'said other chamber, and into adjacency to'the point of junction between said chambers wherebyanfannular opening is provided, an air connection to said last chamber opening laterally thereinto, and a discharge connection communicating with said perforated 'tubular element, the liquid aerated within said tubular member passing.l therefrom by way of-said discharge connection. e f

5. In a foot piece or pump, a casing member i providing 'substantially parallel upwardly extending chambers connected at their lower ends, one of said chambers having a connection at its upper end for a liquid supply line, a perforated tubular element eX- tending intofsaidV other chamber, an air lconnection directly to said last chamber,"and a discharge vconnection communicating with said perforated tubular lel`ement,'the liquid aeratedwithin said tubular element passing therefrom by way of said discharge Vconnection, vthe* axes 'of sai'd connections lying at the edges of a triangular prism. Y u Y 6.; In afoot piece or.pump,.a casing' member providing'substantially parallel upwardly-Y extending -chambers connected at' their lower ends, one of said chambers having a connection at its upper end for a liquid'supply line, a perforated tubular 'element-extending into said other chamber, an air connection `directly to said last chamber, Yand a discharge connection communicating Awith said kperforated tubulary element, the liquid aerated within Vsaid tubular` element passing therefrom by way of said discharge connection, the axes of said connection lying at the edges of a right triangular prism.

v7. In a foot piece or pump, a casing member providing substantially parallel upwardly extending chambers connected at their lower-ends, one of said chambers having a connection at its upper end for a liquid supply line, `a perforated-tubular element eX- tendinginto said other chamber and through whichY liquid normally flows during pumping,

fies

Vanair-connection to said lastk chamber and v from vwhich' air Y passesV into 'said perforated and a.idischarge connection. communicating aerating section, and means whereby air supply in excess of the `discharge capacity of the perforations in said aerating section may be discharged to the rising column of liquid including a supplemental passageway of relatively large capacity below the normally operative perforations in said aerating section and'below the point of supply of pumping air to said casing.

In testimony whereof I aiix my signature.

IIALBERT B. HALVORSEN.

ly extending chambers connected at their i lower ends, one of said chambers having a connection at its upper end for a liquid supply line, a perforated tubular element extend ing into said other chamber, an air connection to said last chamber and from which air fiows to said element through the perforations thereof, and a discharge connection communicating with said perfo-rated tubular element, the liquid aerated within said tubular element passing therefrom by way of said discharge connection, the axes of said connecf tions lying at the edges of a right triangular prism and the several connections entering said casing in such relation to the central axis of the latter that the outermost point of said air `connection is not more remote from said axis than other points in said casing.

9. In an air lift pump, -a foot piece comprising a casing and a perforatedv aerating section within said casing cooperating to form an annular air chamber from which air under pressure may be supplied to a rising column of liquid, said aerating section being supported on said casing and depending within the latter and having its lower end cooperating with saidcasing to form a generally annular opening for the escape of solid material, said opening also serving as an auxiliary aerating means when air is supplied to said chamber 1n excess of the discharge ca- Y pacity of the aerating section and said aerating section having the inner wall thereof forming a passageway for the rising column of liquid, and means for supplying airto said annular air chamber at a locus Vabove said annular opening.

l0. In an air lift pump, a foot piece comprising a casing and a perforated aerating section in said casing, said casing and section having an annular opening therebetween through which communication exists between the interior of said perforated aeratingrsec-V tion and the space between said casing and said aerating section, and means for supplying air to Vsaid section at a locus above said annular opening for pumping liquid through said foot piece.v

11. In an air lift pump, a foot piece comprising a casing and a perforated aerating section associated therewith, means for supplying air under pressure to said casing for admission through the perforations in said 

